/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:31:10,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:31:10,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:31:10,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:31:10,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:31:10,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:31:10,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:31:10,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:31:10,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:31:10,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:31:10,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:31:10,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:31:10,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:31:10,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:31:10,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:31:10,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:31:10,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:31:10,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:31:10,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:31:10,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:31:10,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:31:10,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:31:10,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:31:10,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:31:10,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 23:31:10,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 23:31:10,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 23:31:10,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 23:31:10,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 23:31:10,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 23:31:10,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 23:31:10,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 23:31:10,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 23:31:10,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 23:31:10,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 23:31:10,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 23:31:10,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 23:31:10,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 23:31:10,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:31:10,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:31:10,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:31:10,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 23:31:10,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:31:10,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:31:10,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:31:10,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:31:10,837 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:31:10,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:31:10,838 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:31:10,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:31:10,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:31:10,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:31:10,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:31:10,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:31:10,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:31:10,839 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:31:10,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:31:10,840 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:31:10,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:31:10,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:31:10,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:31:10,840 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:31:10,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:31:10,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:31:10,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:31:10,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:31:10,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:31:10,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:31:10,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:31:10,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:31:10,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:31:10,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:31:11,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:31:11,181 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:31:11,184 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:31:11,186 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:31:11,186 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:31:11,187 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-18 23:31:11,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40abe5887/aad726f7e3f24a88956a5d835cfe96eb/FLAG29f0975ca [2020-08-18 23:31:11,694 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:31:11,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-18 23:31:11,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40abe5887/aad726f7e3f24a88956a5d835cfe96eb/FLAG29f0975ca [2020-08-18 23:31:12,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40abe5887/aad726f7e3f24a88956a5d835cfe96eb [2020-08-18 23:31:12,079 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:31:12,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:31:12,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:31:12,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:31:12,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:31:12,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:31:12" (1/1) ... [2020-08-18 23:31:12,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bdfc9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:12, skipping insertion in model container [2020-08-18 23:31:12,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:31:12" (1/1) ... [2020-08-18 23:31:12,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:31:12,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:31:12,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:31:12,327 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:31:12,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:31:12,355 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:31:12,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:12 WrapperNode [2020-08-18 23:31:12,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:31:12,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:31:12,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:31:12,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:31:12,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:12" (1/1) ... [2020-08-18 23:31:12,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:12" (1/1) ... [2020-08-18 23:31:12,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:12" (1/1) ... [2020-08-18 23:31:12,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:12" (1/1) ... [2020-08-18 23:31:12,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:12" (1/1) ... [2020-08-18 23:31:12,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:12" (1/1) ... [2020-08-18 23:31:12,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:12" (1/1) ... [2020-08-18 23:31:12,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:31:12,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:31:12,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:31:12,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:31:12,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:31:12,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:31:12,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:31:12,528 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 23:31:12,529 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-18 23:31:12,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:31:12,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 23:31:12,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:31:12,530 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 23:31:12,530 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-18 23:31:12,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:31:12,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:31:12,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:31:12,761 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:31:12,762 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 23:31:12,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:31:12 BoogieIcfgContainer [2020-08-18 23:31:12,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:31:12,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:31:12,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:31:12,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:31:12,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:31:12" (1/3) ... [2020-08-18 23:31:12,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405d9b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:31:12, skipping insertion in model container [2020-08-18 23:31:12,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:31:12" (2/3) ... [2020-08-18 23:31:12,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405d9b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:31:12, skipping insertion in model container [2020-08-18 23:31:12,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:31:12" (3/3) ... [2020-08-18 23:31:12,803 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-08-18 23:31:12,827 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:31:12,834 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:31:12,851 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:31:12,880 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:31:12,880 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:31:12,880 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:31:12,880 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:31:12,880 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:31:12,881 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:31:12,881 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:31:12,881 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:31:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-18 23:31:12,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 23:31:12,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:12,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:12,907 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:12,912 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-18 23:31:12,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:12,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329938042] [2020-08-18 23:31:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:31:13,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329938042] [2020-08-18 23:31:13,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:31:13,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:31:13,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004312011] [2020-08-18 23:31:13,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:31:13,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:13,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:31:13,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:31:13,257 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-18 23:31:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:13,315 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-18 23:31:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:31:13,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 23:31:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:13,326 INFO L225 Difference]: With dead ends: 40 [2020-08-18 23:31:13,327 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 23:31:13,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:31:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 23:31:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 23:31:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 23:31:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 23:31:13,376 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-18 23:31:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:13,376 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 23:31:13,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:31:13,377 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 23:31:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:31:13,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:13,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:13,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:31:13,380 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:13,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-18 23:31:13,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:13,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165429784] [2020-08-18 23:31:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:31:13,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165429784] [2020-08-18 23:31:13,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:31:13,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:31:13,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105299557] [2020-08-18 23:31:13,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:31:13,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:13,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:31:13,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:31:13,551 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-18 23:31:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:13,571 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 23:31:13,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:31:13,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 23:31:13,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:13,577 INFO L225 Difference]: With dead ends: 32 [2020-08-18 23:31:13,577 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 23:31:13,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:31:13,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 23:31:13,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 23:31:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 23:31:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 23:31:13,587 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-18 23:31:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:13,587 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 23:31:13,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:31:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 23:31:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:31:13,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:13,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:13,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:31:13,590 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-18 23:31:13,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:13,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337361909] [2020-08-18 23:31:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:31:13,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337361909] [2020-08-18 23:31:13,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:31:13,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 23:31:13,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338296314] [2020-08-18 23:31:13,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 23:31:13,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:13,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 23:31:13,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:31:13,780 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-18 23:31:13,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:13,847 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 23:31:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 23:31:13,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-18 23:31:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:13,850 INFO L225 Difference]: With dead ends: 48 [2020-08-18 23:31:13,850 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 23:31:13,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:31:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 23:31:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 23:31:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 23:31:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-18 23:31:13,860 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-18 23:31:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:13,860 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-18 23:31:13,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 23:31:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-18 23:31:13,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:31:13,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:13,862 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:13,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:31:13,863 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:13,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:13,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-18 23:31:13,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:13,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609793271] [2020-08-18 23:31:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:13,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 23:31:14,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609793271] [2020-08-18 23:31:14,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:31:14,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:31:14,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924391842] [2020-08-18 23:31:14,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:31:14,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:14,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:31:14,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:31:14,015 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-18 23:31:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:14,044 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-18 23:31:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:31:14,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 23:31:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:14,047 INFO L225 Difference]: With dead ends: 50 [2020-08-18 23:31:14,047 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 23:31:14,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:31:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 23:31:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-18 23:31:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 23:31:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-18 23:31:14,057 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-18 23:31:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:14,057 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-18 23:31:14,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:31:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-18 23:31:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:31:14,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:14,060 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:14,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:31:14,060 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:14,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-18 23:31:14,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:14,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453372751] [2020-08-18 23:31:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 23:31:14,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453372751] [2020-08-18 23:31:14,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:14,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 23:31:14,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260705141] [2020-08-18 23:31:14,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 23:31:14,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:14,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 23:31:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:31:14,308 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-18 23:31:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:14,411 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-18 23:31:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 23:31:14,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-18 23:31:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:14,413 INFO L225 Difference]: With dead ends: 64 [2020-08-18 23:31:14,414 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 23:31:14,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:31:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 23:31:14,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-18 23:31:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 23:31:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-18 23:31:14,422 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-18 23:31:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:14,423 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-18 23:31:14,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 23:31:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-18 23:31:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 23:31:14,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:14,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:14,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:31:14,425 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-18 23:31:14,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:14,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147615104] [2020-08-18 23:31:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 23:31:14,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147615104] [2020-08-18 23:31:14,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:14,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 23:31:14,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054175907] [2020-08-18 23:31:14,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 23:31:14,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:14,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 23:31:14,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 23:31:14,711 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-18 23:31:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:14,874 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-08-18 23:31:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 23:31:14,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-18 23:31:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:14,876 INFO L225 Difference]: With dead ends: 72 [2020-08-18 23:31:14,876 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 23:31:14,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 23:31:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 23:31:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-08-18 23:31:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 23:31:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-18 23:31:14,884 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-18 23:31:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:14,885 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-18 23:31:14,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 23:31:14,885 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-18 23:31:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 23:31:14,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:14,887 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:14,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:31:14,887 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-18 23:31:14,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:14,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915595006] [2020-08-18 23:31:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:14,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-18 23:31:15,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915595006] [2020-08-18 23:31:15,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:15,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 23:31:15,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477251833] [2020-08-18 23:31:15,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 23:31:15,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:15,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 23:31:15,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 23:31:15,255 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2020-08-18 23:31:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:15,451 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-08-18 23:31:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 23:31:15,453 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-08-18 23:31:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:15,455 INFO L225 Difference]: With dead ends: 80 [2020-08-18 23:31:15,455 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 23:31:15,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-18 23:31:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 23:31:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-08-18 23:31:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 23:31:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-18 23:31:15,464 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2020-08-18 23:31:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:15,464 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-18 23:31:15,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 23:31:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-18 23:31:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 23:31:15,466 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:15,466 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:15,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:31:15,467 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:15,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-18 23:31:15,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:15,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396924985] [2020-08-18 23:31:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 23:31:15,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396924985] [2020-08-18 23:31:15,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:15,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 23:31:15,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225376078] [2020-08-18 23:31:15,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 23:31:15,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:15,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 23:31:15,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 23:31:15,915 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 20 states. [2020-08-18 23:31:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:16,259 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-08-18 23:31:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 23:31:16,260 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-08-18 23:31:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:16,262 INFO L225 Difference]: With dead ends: 90 [2020-08-18 23:31:16,262 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 23:31:16,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:31:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 23:31:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2020-08-18 23:31:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 23:31:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-18 23:31:16,271 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 48 [2020-08-18 23:31:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:16,271 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-18 23:31:16,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 23:31:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-18 23:31:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 23:31:16,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:16,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:16,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:31:16,274 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1464480251, now seen corresponding path program 3 times [2020-08-18 23:31:16,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:16,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952129337] [2020-08-18 23:31:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:16,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:16,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:16,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:16,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:16,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:16,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:16,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-18 23:31:16,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952129337] [2020-08-18 23:31:16,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:16,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 23:31:16,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081655470] [2020-08-18 23:31:16,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 23:31:16,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 23:31:16,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 23:31:16,804 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-08-18 23:31:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:17,113 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-08-18 23:31:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 23:31:17,114 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-08-18 23:31:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:17,115 INFO L225 Difference]: With dead ends: 94 [2020-08-18 23:31:17,115 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 23:31:17,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:31:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 23:31:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-08-18 23:31:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 23:31:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-18 23:31:17,125 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 55 [2020-08-18 23:31:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:17,126 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-18 23:31:17,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 23:31:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-18 23:31:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 23:31:17,127 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:31:17,128 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:31:17,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:31:17,128 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:31:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:31:17,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1405297280, now seen corresponding path program 3 times [2020-08-18 23:31:17,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:31:17,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317744831] [2020-08-18 23:31:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:31:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:17,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:31:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:17,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:31:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:17,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:17,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:17,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:17,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:17,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:17,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:17,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 23:31:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:31:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-18 23:31:17,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317744831] [2020-08-18 23:31:17,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:31:17,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 23:31:17,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173031556] [2020-08-18 23:31:17,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 23:31:17,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:31:17,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 23:31:17,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 23:31:17,694 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 20 states. [2020-08-18 23:31:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:31:17,967 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-08-18 23:31:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 23:31:17,968 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-08-18 23:31:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:31:17,968 INFO L225 Difference]: With dead ends: 82 [2020-08-18 23:31:17,969 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 23:31:17,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:31:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 23:31:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 23:31:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 23:31:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 23:31:17,973 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-08-18 23:31:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:31:17,974 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 23:31:17,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 23:31:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 23:31:17,974 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 23:31:17,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:31:17,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 23:31:18,002 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 23:31:18,003 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:31:18,003 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-18 23:31:18,003 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-18 23:31:18,003 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-18 23:31:18,003 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-18 23:31:18,003 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-18 23:31:18,004 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-18 23:31:18,004 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-18 23:31:18,004 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:31:18,004 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 23:31:18,004 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 23:31:18,004 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 23:31:18,006 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-18 23:31:18,006 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-18 23:31:18,007 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-18 23:31:18,007 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-18 23:31:18,007 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-18 23:31:18,007 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-18 23:31:18,007 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 23:31:18,007 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-18 23:31:18,008 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-18 23:31:18,008 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-18 23:31:18,008 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-18 23:31:18,008 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-18 23:31:18,008 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 23:31:18,008 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-18 23:31:18,008 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-18 23:31:18,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:31:18 BoogieIcfgContainer [2020-08-18 23:31:18,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:31:18,018 INFO L168 Benchmark]: Toolchain (without parser) took 5936.16 ms. Allocated memory was 136.8 MB in the beginning and 299.4 MB in the end (delta: 162.5 MB). Free memory was 100.2 MB in the beginning and 104.6 MB in the end (delta: -4.5 MB). Peak memory consumption was 158.1 MB. Max. memory is 7.1 GB. [2020-08-18 23:31:18,019 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 23:31:18,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.84 ms. Allocated memory is still 136.8 MB. Free memory was 99.9 MB in the beginning and 90.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:31:18,021 INFO L168 Benchmark]: Boogie Preprocessor took 103.01 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 90.3 MB in the beginning and 178.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 23:31:18,021 INFO L168 Benchmark]: RCFGBuilder took 308.03 ms. Allocated memory is still 199.8 MB. Free memory was 178.7 MB in the beginning and 165.0 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-18 23:31:18,022 INFO L168 Benchmark]: TraceAbstraction took 5230.35 ms. Allocated memory was 199.8 MB in the beginning and 299.4 MB in the end (delta: 99.6 MB). Free memory was 165.0 MB in the beginning and 104.6 MB in the end (delta: 60.4 MB). Peak memory consumption was 160.0 MB. Max. memory is 7.1 GB. [2020-08-18 23:31:18,026 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.84 ms. Allocated memory is still 136.8 MB. Free memory was 99.9 MB in the beginning and 90.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.01 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 90.3 MB in the beginning and 178.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 308.03 ms. Allocated memory is still 199.8 MB. Free memory was 178.7 MB in the beginning and 165.0 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5230.35 ms. Allocated memory was 199.8 MB in the beginning and 299.4 MB in the end (delta: 99.6 MB). Free memory was 165.0 MB in the beginning and 104.6 MB in the end (delta: 60.4 MB). Peak memory consumption was 160.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.1s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 323 SDtfs, 58 SDslu, 3296 SDs, 0 SdLazy, 1115 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 256 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 62 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 337 ConstructedInterpolants, 0 QuantifiedInterpolants, 50267 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 118/206 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...